Remote detection sonar threatens the oceans

The U.S. Marines and recently NATO have been testing a sonar system
which can detect submarines over long distances and which in the future
is expected to cover 75% of our oceans. The technology which makes this
possible is low frequency active sonar (LFAS) which works at an output
sound level of more than 215 decibels. A sound pressure level of 140
decibels, for example from a gunshot, can still be measured at a
distance of 380 km away. Such acoustic detonations, even if only brief,
are dangerous for living organisms and pose a threat not only to whales
and dolphins but also to sharks and bony fish.